Smonson wrote:Haha, Quartus has about three trillion buttons I've never clicked on...

I see

You'll soon learn that the more internal RAM available you have, the more useful SignalTap is. I realize it is not easy to replace the FPGA, but it is recommended to debug with a larger FPGA so that you have lots of internal RAM. Altera provides what they call "Vertical Migration", larger parts with full compatible pinout. That's only for debugging of course, not for production. Yeah, I know, that's not like changing DIP chips on a socket

What I didn't check was whether the link is in error. It contains several different documents - the Mega STE service manual is just the top one. The above section was from the Mega ST field manual 4.0. You're of course right that an ST Shifter is not in a Mega STE. It's still likely that Atari made up documents for a revision that never came to light.

You'll soon learn that the more internal RAM available you have, the more useful SignalTap is. I realize it is not easy to replace the FPGA, but it is recommended to debug with a larger FPGA so that you have lots of internal RAM. Altera provides what they call "Vertical Migration", larger parts with full compatible pinout. That's only for debugging of course, not for production. Yeah, I know, that's not like changing DIP chips on a socket

I'll look into it, I'm only using 24784 bits right now, out of 119808 available in the EP2C5 (20%), so there's a lot of room.